Lakhdar Chiter

6 Questions 16 Answers 0 Followers

Questions related from Lakhdar Chiter

What is the impact of self citation?

What is the impact of self-citations on your work when more citations comes from yourself, your students, colleagues, your intitution colleagues, but never outside?

05 May 2016 1,160 3 View

Multi-disciplinary journals?

What is the impact on the publication in a multidisciplinary journal, ISI indexed? As example, publishing any work related to Mathematics in an applied science journal in general (for ex....

04 April 2016 4,252 0 View

About the functional equation f(xy) = f(x)/y?

Let f be an involutive (f(f(x)) = x) function from R>0 to R>0 such that f(1) = c, (then f(c) = 1). I have obtained the following f(f(x)f(y))/xy = f(xy)/f(x)f(y), by setting f(y) = 1, we get...

04 April 2016 5,079 2 View

Is it easy to prove that the only function such that f(f(x)) = x with f(1) = c is f(x) = c/x ?

I have found that this function must satisfy another known functional equation : f(x+y)=f(x)f(y)/f(x)+f(y) which is itself reduced to the well known Cauch functional equation g(x+y)=g(x)+g(y)...

05 May 2014 4,980 3 View

Diagonal or banded matrix and a hollow matrix

In terms of computation, what is the difference between a diagonal matrix (for which the nonzero terms are in the diagonal: tridiagonal, pentadiagonal, ... and all the other elements are equal to...

08 August 2012 9,761 9 View

Relation between Haar functions and Walsh functions?

Is there any relationship between Walsh functions and rationalized Haar functions? Can we express a Walsh functions in terms of Haar functions?

08 August 2012 8,191 6 View